Pneumatic gun



FIG. 1 is a top front left side perspective view of a pneumatic gun showing my new design;

FIG. 2 is a bottom right side perspective view;

FIG. 3 is a top plan view;

FIG. 4 is a left elevational view;

FIG. 5 is a bottom plan view;

FIG. 6 is a right side elevational view showing the lower portion unlatched;

FIG. 7 is a front elevational view; and

FIG. 8 is a rear elevational view thereof. 

The ornamental design for a pneumatic gun, as shown. 